本题目来源于试卷: Work Energy and Power，类别为 美国物理杯赛(Physics Bowl)
[单选题]
17.11: A 5.00 kg block slimr i qkrrc3j6 rce1u.c94/+xjdesuyk1xn0 n/w a1j p0wo( with uniform acceleration on a horizontal surface fox/w1 u kwpj01nya( 0nor 5.00 s. The block’s kinetic energy strictly decreases from 50.0 J to 20.0 J in this time.
What is the average speed of the block during the motion described?
A. 7.00 m/s
B. 3.74 m/s
C. 3.65 m/s
D. 2.65 m/s
E. 2.58m/s
参考答案: C
本题详细解析:
暂无
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